PRE-TUNING CHECK LIST. STREET
TUNING.
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1.
Check for tight intake and tight exhaust. [Vacuum leaks and exhaust
header leaks].
a. Do that by either smoke check or use shop pressurized air.
b. The tuner might be able to perform this service [for a fee] if you are not
equipped.
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2.
Verify fuel pump and fuel pressure is sound and proper.
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3.
Ensure you have fresh O2 sensors
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4.
Install new spark plugs and gap as required for the mods and verify good plug
wires.
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5.
Have a list of all of the modifications for your tuner. Note the mods in
detail.
Don’t forget
things like rear gear ratio, tire size, throttle body size, fuel injector data.
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6.
Driveshaft and U-joints in good condition.
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7.
Verify spark timing with a timing light. Take the time to find top dead
center and install a timing pointer at the crank damper. If you
don’t have the ability to check timing with a timing light because commanded
timing jumps around too much then the dyno shop can force your ECM to command a
steady timing and they can check. At the very least install the timing pointer
and verify TDC.
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8.
Verify battery voltage and good alternator charging.
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9. Tires.
Good condition and proper air pressure
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10.
Fresh engine oil change. Fuel
or dirt in the oil is not desired, especially during strip or street or dyno
tuning.